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Editorial Team
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Asked: 2026-05-13T22:41:10+00:00

I have a table (user) that contains user information. I have another table (userview)

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I have a table (user) that contains user information.

I have another table (userview) that records user views – that is, when one user views another users details, I record the id of the viewer and also, the id of the user he/she viewed.

I want to write a query that will help me answer the question:

Fetch the list of ALL users that were viewed by users that viewed a SPECIFIED user.

It seems a straight forward enough innocous requirement, but I am coming up with SQL that is (atleast to my mind), far too complicated. I think an elegant solution would use a self join on userview and (possibly?) an inner join between user and userview.

Are there any SQL ‘poets’ out there that can help with this?

I am using mySQL 5.x, but ideally the SQL should be fb agnostic

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1 Answer

  1. Editorial Team

    Lets start with “users that viewed this user”:

    select v1.viewer
from userview v1
where v1.viewee = @thisUserId

    Then add “users that were viewed by”:

    select v2.viewee
from userview v1
inner join userview v2 on v2.viewer = v1.viewer
where v1.viewee = @thisUserId

    Then add the user table to get the data from it:

    select u.userid, u.someotherfields
from userview v1
inner join userview v2 on v2.viewer = v1.viewer
inner join user u on u.userid = v2.viewee
where v1.viewee = @thisUserId
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